Resumo

GONZALEZ BACERIO, Jorge et al. Extraction systems for isolating esterases having interfacial adsorption. Rev. colomb. biotecnol [online]. 2009, vol.11, n.1, pp.7-16. ISSN 0123-3475.

Interfacial esterases present great functional versatility, making them very attractive molecules for industrial applications. The conditions for extracting interfacial esterases previously detected in the sea anemone Stichodactyla helianthus and the shrimp Litopenaeus vannamei were optimised in this work. Animal homogenates were treated with Triton X-100, Tween 20 and Tween 80 detergents at two different concentrations: critical micellar concentration (CMC) and half of that concentration; 0.5 mol/L NaCl and n-butanol at 5%, 10% and 20% v/v ratios were also tested. Each procedure was compared to the control extraction method using distilled water. The best results were obtained with 20% n-butanol for recovering esterase and phospholipase activity whilst 10% n-butanol extraction was the most effective for lipase activity isolation. This solvent's suitability for isolating interface-activated enzymes could be explained by its ability to dissociate biomolecule aggregates and cause enzyme desorption from the membranes and tissues remaining in the preparation.

Palavras-chave : interfacial activation; interfacial esterase; lipase; Stichodactyla helianthus; Litopenaeus vannamei.

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